I am looking for doctors and/or medical centers in Massachusetts who
perform an endoscopic stapling procedure for the treatment of Zenker's
diverticulum.  Please, include as many details as possible/practical.

To further clarify what I am looking for and to save time for potential responders:
I am aware of Yale Mdical Center offering this treatment
(Connecticut).  I specifically ask for Massachusetts only (insurance
reasons).  Please, do not provide any medical info on the desease
itself or treatment options.  Also, I am not looking for a list of
Massachusstts hospitals or centers which offer other treatments of
this condition - I've been to all of them.

Thank you very much for taking time to read my question.  I appreciate you answer.